Delphi开发中子窗口不能置顶的问题

分类：Delphi, System 阅读 (3,975) Add comments

1月 062015

转载请注明原文地址：http://bcoder.com/delphi/sub-window-can-not-set-to-topmost-in-delphi-development

　　在Delphi开发中，如果我们想让一个窗口始终置顶显示，则我们只需要把窗口FormStyle属性设置为fsStayOnTop就可以了，但是如果这个窗口不是主窗口，而是子窗口，那就有些麻烦了，设置FormStyle为fsStayOnTop后也无效。解决办法就是在子窗口中重载CreateParams函数，并将WndParent设置为0即可，具体代码如下：

unit Unit2;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls;

type
  TForm2 = class(TForm)
    Button1: TButton;
    Timer1: TTimer;
  private
    { Private declarations }
  public
    { Public declarations }
  protected
    procedure CreateParams(var Params: TCreateParams); override;
  end;

var
  Form2: TForm2;

implementation

{$R *.dfm}

{ TForm2 }



procedure TForm2.CreateParams(var Params: TCreateParams);
begin
  inherited;
  Params.WndParent := 0;
//  Params.ExStyle := Params.ExStyle or WS_EX_TOOLWINDOW; //如果不想在任务栏显示窗口图标
end;


end.

unit Unit2;

interface

uses

Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

Dialogs, StdCtrls, ExtCtrls;

type

TForm2 = class(TForm)

Button1: TButton;

Timer1: TTimer;

private

{ Private declarations }

public

{ Public declarations }

protected

procedure CreateParams(var Params: TCreateParams); override;

end;

var

Form2: TForm2;

implementation

{$R *.dfm}

{ TForm2 }

procedure TForm2.CreateParams(var Params: TCreateParams);

begin

inherited;

Params.WndParent := 0;

// Params.ExStyle := Params.ExStyle or WS_EX_TOOLWINDOW; //如果不想在任务栏显示窗口图标

end;

end.

Delphi如何使子窗口显示在任务栏中

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